<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=, initial-scale=1.0">
    <title>Document</title>
    <style>
        canvas{
            border: 2px solid ;
            margin: 70px 500px;
        }
       
    </style>
</head>
<body>
   <canvas id="one" width="700px" height="700px"></canvas> 
</body>
</html>
<script>
 var wu = document.getElementById('one');
var m=wu.getContext('2d');//两个变量一定要声明否则出不来，

</script>
<script src="w1.js/try10.js"> chubulai</script>
